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Finding the Fourth Proportional to 49.40, 73.80 and 44.32

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Solution

The fourth proportional to 49.40, 73.80 and 44.32 is: 66.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.40 : 73.80 = 44.32 : x
  2. Step 2: Convert to fraction form
    49.40/73.80 = 44.32/x
  3. Step 3: Cross multiply
    49.40x = 73.80 × 44.32
  4. Step 4: Simplify right side
    49.40x = 3,270.82
  5. Step 5: Solve for x
    x = 3,270.82/49.40
  6. Step 6: Final answer
    x = 66.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.